Most of the thermos is sealed to carry out insulation, because of the structure of the tea itself, will be in the case of airtight fermentation, after the fermentation of tea will produce some harmful to the body of substances. Tea is rich in protein, fat, sugar, vitamins and minerals and other nutrients, is a natural health drink, which contains tea polyphenols, caffeine, tannins, tea pigments, and has a variety of pharmacological effects.
Tea for a long time immersed in high-temperature water, like warm fire frying, tea polyphenols, tannin and other substances will be a large number of leaching, so that tea color thick, bitter astringent.
Vitamin C and other nutrients in the water temperature more than 80 ℃ will be destroyed, prolonged high temperature immersion will make its loss too much, thus reducing the health of tea function. At the same time, because of the high water temperature has been maintained, tea aromatic oil will soon be a large number of volatile, tannic acid, theophylline A large number of exudation, so that not only reduce the nutritional value of tea, reducing the tea flavor, but also to increase the harmful substances.
If you drink this tea for a long time, it will endanger your health, leading to a variety of diseases in the digestive, cardiovascular, neurological and hematopoietic systems.